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    <title>Document</title>
    <script>
        //数组反转
        function rverse(arr) {
            var newArr = [];
            for (var i = 1; i <= arr.length; i++) {
                newArr[arr.length - i] = arr[i - 1];
            }
            return newArr;
        }
        var arr = rverse([1, 2, 3]);
        console.log(arr);
        //冒泡排序
        function Sort(arr) {
            var temp;
            for (var i = 0; i < arr.length - 1; i++) {
                for (var j = 0; j < arr.length - 1 - i; j++) {
                    if (arr[j] > arr[j + 1]) {
                        temp = arr[j];
                        arr[j] = arr[j + 1];
                        arr[j + 1] = temp;
                    }
                }
            }
            return arr;
        }
        var sort = Sort([3, 5, 4, 2, 1]);
        console.log(sort);
    </script>
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